| 摘要 |
PROBLEM TO BE SOLVED: To finely control an air conditioning operation by controlling the wind amount and the temperature of the air conditioning operation according to the insolation amount so as to be different on the side of a driver's seat, on the side of an assistant driver's seat an on the side of a rear seat according to the insolation direction. SOLUTION: This insolation sensor 1 is provided with a light receiving element 2 whose light receiving face is divided into a plurality of at least three light receiving regions 2a, 2b, 2c, 2d and which outputs detection signals according to insolation amounts which are respectively incident from the respective light receiving regions. The insolation sensor is provided with a light receiving lens 3 which is arranged and installed by keeping a prescribed interval from the respective light receiving regions on the photodetector 2, and an insolation- state computing means which computes an insolation state such as an insolation amount, insolation altitude, insolation direction or the like on the basis of the detection signals of the respective light receiving regions. The light receiving lens 3 is composed of a first face 3a whose optical axis Z passes nearly the center of the lens 3, which passes the center of the light receiving face of the photo detector 2 and which passes the point of intersection of dividing lines dividing the light receiving face into the respective light receiving regions. The light receiving lens 3 is composed of a second face 3b whose radius of curvature is smaller than that of the first face on the side of the photo detector 2 and which has a nearly concave spherical shape.
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